all together, simultaneously
Все зрители враз закричали от восторга.
All the spectators cheered at once with delight.
Мы враз поняли, что опоздали.
We realized all at once that we were late.
Собаки враз залаяли во дворе.
The dogs all started barking at once in the yard.
сра́зу
immediately; at one stroke
неме́дленно
immediately
одновре́менно
simultaneously
то́тчас
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